Numerical investigation of the nozzle flow of a vibrationally nonequilibrium medium of a CO/sub 2/ gasdynamic laser
Journal Article
·
· Sov. J. Quant. Electron. (Engl. Transl.); (United States)
The results are given of a numerical investigation of the nozzle flow of a vibrationally nonequilibrium active medium of a CO/sub 2/ gasdynamic laser with separate heating of the exciting gas (nitrogen) and subsequent selective excitation (in a region downstream from the throat cross section) of the emitting gas (CO/sub 2/). A solution of the problem of two-dimensional flow of vibrationally relaxing nitrogen in a Laval nozzle up to the point of injection of the CO/sub 2/--He mixture was obtained by the steady-state method using a difference scheme of the third order of precision. The solution of the problem of the flow of a vibrationally relaxing CO/sub 2/--N/sub 2/--He mixture was obtained in the approximation of instantaneous mixing using a through calculation method and a first-order difference scheme. The results are given of a calculation of the flow of nonequilibrium heated nitrogen in a Laval nozzle. A comparison is made of the maximum parameters of a gasdynamic laser with homogeneous selective excitation in the case of equilibrium and nonequilibrium heating of nitrogen. It is shown numerically that a CO/sub 2/ gasdynamic laser can be constructed with a pressure in the resonator of approx.1 atm.
- OSTI ID:
- 6590746
- Journal Information:
- Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 12:6; ISSN SJQEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE LASERS
CARBON OXIDES
CHALCOGENIDES
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITATION
EXCITED STATES
FEASIBILITY STUDIES
FLUID FLOW
GAS DYNAMIC LASERS
GAS FLOW
GAS LASERS
HEATING
LASER CAVITIES
LASERS
LOW PRESSURE
MIXING
NITROGEN
NONMETALS
NOZZLES
OXIDES
OXYGEN COMPOUNDS
RELAXATION
RESONATORS
TWO-DIMENSIONAL CALCULATIONS
VIBRATIONAL STATES
420300* -- Engineering-- Lasers-- (-1989)
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON DIOXIDE LASERS
CARBON OXIDES
CHALCOGENIDES
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITATION
EXCITED STATES
FEASIBILITY STUDIES
FLUID FLOW
GAS DYNAMIC LASERS
GAS FLOW
GAS LASERS
HEATING
LASER CAVITIES
LASERS
LOW PRESSURE
MIXING
NITROGEN
NONMETALS
NOZZLES
OXIDES
OXYGEN COMPOUNDS
RELAXATION
RESONATORS
TWO-DIMENSIONAL CALCULATIONS
VIBRATIONAL STATES